Window-sash



J. KUNZELMANN.

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APPLICATON FILED JULY 1,1915.

1,195,69Q- Patentemug. 22,1916.

JOHN KUNZELMANN, OF BALTIMORE, MARYLAND. Y

WINDOW-SASH.

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Specification of Letters Patent.

Patented Aug', 22, 1916.

Application led July 1, 1915'. Serial N 0. 37,442.

have invented certain new and useful Improvements in Window-Sashes, of which the following is a specification.

This invention relates to windowsashes lwhich are constructed of sheet metal, and

its Objectis toprovide a novel and improved sasli of this kind which is so constructed and assembled that it makes a weathertight joint with the window frame, and is also held against rattling.

The invention also has for its object to provide a sash which slides. freely in the guide,channels of the window frame j ambs.

The objects stated hereinabove are attained by means of a combination and arrangement of parts to be hereinafter described and claimed, and in order that the same may be better understood, reference is had to the accompanying4 drawing, in which- Figure l is a side elevation of one side of v the sash, with parts in section; Fig. 2' is a horizontal section `through one yside o f the sash and the window frame, and Fig. 3 is an enlarged horizontal section of one of the sash stiles and the portion of the window frame engaged thereby.

Referring specifically to the drawing,A 5 denotes a hollow sheet metal jamb of a Window frame, the same having the usual parallel vertical guide channels 6 for the winv dow sashes 7 the latter being slidable in the channels. The stiles and bars of the sashes are also hollow and made of sheet metal. Each sash stile comprises spaced inner and outer face portions 8 and 9, respectively, and an edge portion 10. Thepane 1l is mounted in the vsash frame in any suitable manner. The edge portion 10 of the stile is a sheet metal strip which is located between the face portions 8 and 9, a short distance inward of the outer vertical edges thereof. The strip has outstanding diverging flanges 12 at its opposite vertical edges, said flanges `extending linto the channel 6, and having their extremities bent back in the form of hooks 13 over the outer faces of the vertical edge portions of the parts 8 and 9 which are located in the channel, whereby the strip is made fast to said parts 8 and 9. That portion of the stile which seats in the channel is reduced in width by bending the edge portion of the parts 8 and 9 inward toward each other, as indicated at 14, and said bends terminate in outward or diverging bends 15 to receive the bends 13. The bends 14 start at the outer corners 16 of the channel 6, and form rounded shoulders on the parts 8 and 9 which lit and bear against said corners.

The distance between the corners 16 of the channel 6 is slightly less than the distance between the outer faces of the parts 8 and 9, so that when the sash is mounted in-place, said parts must be pressed slightly together to engage the channel corners, and as they are resilient they lit snugly against the channel corners and yieldingly engage the same, thereby making a weathertight joint, and also preventing rattling ofthe sash. The sash however is free to slide as the parts^8 and 9 do not press the channel corners with sulicient force'to cause binding owing to the slight engagementof the rounded corners. ,The flanges 12 are joined to the body of the strip 10 by,` curved bends 17 one at each edge which are spaced a short distance from the inner surface of the parts 8 and 9, to allow the latter to yieldingly engage the channel corners as described.

`These'bends resiliently connect the ianges to the body of the strip, and the flanges are therefore free to yield with the parts 8 and 9 to which they are connected and their resiliency is reinforced by the resilient bends of the edge' strip.

To facilitate sliding of the sash, the edge strip 10 carriesrollers 18 mounted in the channel 6 to engage the rear face thereof. I

A pair of rollers is located at the top, and another pair at the bottom of the sash. Each pair of rollers is carried by a block 19 secured to the outer face of the strip 10 by bolts 20 or other suitable fasteners. The strip 10 is recessed at 21 to accommodate the rollers, and the latter and the block 19 are located between the flanges 12. The members of the respective pairs of 'rollers are laterally spaced and form a wide bearing for the sash, thereby preventing binding of the same in the channel 6.V As the sash is in contact with the jamb only at the corners of the channel, frictionv is reduced to a minimum, and the sash s'lides free and easy.

The structure provides a sheet metal sash without complicated parts liable to get out of order, and a sash which can be easily and cheaply manufactured.

weathertight, and it can be easily raised and lowered.

I claim:

1. In combination with the j'ambs of a window frame having guide channels, a sash slidably mounted in said channels, the stiles of said sash comprising spaced resilient sheet metal Ainner and outer face portions which have their outer edges bent toward each other to provide rounded shoulders on each side of the sash and which are spaced apart slightly wider than the width of said guide-channels to yieldingly engagel the` outer corners thereof and leaving said outer edges free from engagement `with the sides of the guide-channels, and means on said sash for positioning and retaining said rounded shoulders at the outer corners of the guide-channels.

2. In combination with the jambs of a `window frame having sash guide channels,

a sash slidably mounted in said channels, the stiles of said sash comprising spaced sheet metal inner andouter face portions which have their outer edges bent toward each other to provide rounded shoulders which yieldingly engage the outer corners of said guide channelsand leaving said outer edges free from engagement with the sides of said guide channels, and an edge strip located between said inner and outer face portions which tends to force the sides of the sash stiles outwardly and provided with resilient 4outstanding' flanges which are attached to the rear vertical edges of the bent-in outer edges ofsaid face portions.

In testimony whereof I affix my signature.

JOHN KUNZELMANN. 

